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Net Loss Per Share of Common Stock | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Net Loss Per Share of Common Stock | Net Loss Per Share of Common Stock Basic and Diluted Net Loss per Share The following table summarizes the computation of basic and diluted net loss per share (in thousands, except share and per share data):
| Year ended December 31,
| 2018 |  | 2017
Net loss | $ | (17,453 | ) |  | $ | (23,039 | )
Weighted-average shares used to compute basic and diluted net loss per share* | 7,950,284 |  |  | 3,467,096 |
Net loss per share, basic and diluted* | $ | (2.20 | ) |  | $ | (6.65 | )
_________________________________________ * Calculated based on the 1-for-18 reverse stock split effected October 4, 2018. Unvested shares for the years ended December 31, 2018 and December 31, 2017 were excluded from the weighted-average shares used to compute basic and diluted net loss per share. The following common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive:
| December 31,
| 2018 |  | 2017
Stock options | 2,641,198 |  | 3,001,929
Shares subject to repurchase | 74,019 |  | 16,117
Unvested restricted stock units | 53,436 |  |  | — |
Estimated ESPP shares | 89,606 |  | — |
Redeemable convertible preferred stock | — |  |  | 12,066,654
Redeemable convertible preferred stock warrants | — |  |  | 160,657
Common stock warrants | 118,122 |  | 124,326

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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